Clarksville weather by month
What a typical year looks like in Clarksville, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Waynesburg 1 E, 13 km from Clarksville; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 43.1 in1094 mm
- Snow a year
- 30 in76 cm
- Last spring freeze
- May 4
- First fall freeze
- Oct 17
- Heating degree days
- 5,749
- Cooling degree days
- 663
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −1°−18° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Clarksville in January
Highs average 39°4° and lows 19°−7°, with 3.4 in87 mm of precipitation and 10 in24 cm of snow in a typical January.
- Record high
- 75°24° (1999)
- Record low
- −25°−32° (1963)
- Heating degree days
- 1117
- Cooling degree days
- 0
Clarksville in February
Highs average 42°5° and lows 21°−6°, with 2.8 in72 mm of precipitation and 8 in21 cm of snow in a typical February.
- Record high
- 78°26° (2000)
- Record low
- −16°−27° (2026)
- Heating degree days
- 946
- Cooling degree days
- 0
Clarksville in March
Highs average 51°11° and lows 27°−3°, with 3.7 in95 mm of precipitation and 6 in14 cm of snow in a typical March.
- Record high
- 86°30° (2026)
- Record low
- −8°−22° (2015)
- Heating degree days
- 805
- Cooling degree days
- 0
Clarksville in April
Highs average 64°18° and lows 36°2°, with 3.4 in86 mm of precipitation and 0.4 in1 cm of snow in a typical April.
- Record high
- 90°32° (1976)
- Record low
- 14°−10° (2013)
- Heating degree days
- 452
- Cooling degree days
- 5
Clarksville in May
Highs average 73°23° and lows 47°8°, with 4.3 in110 mm of precipitation in a typical May.
- Record high
- 92°33° (1962)
- Record low
- 22°−6° (2002)
- Heating degree days
- 201
- Cooling degree days
- 41
Clarksville in June
Highs average 80°27° and lows 56°13°, with 4.2 in106 mm of precipitation in a typical June.
- Record high
- 98°37° (2012)
- Record low
- 31°−1° (1972)
- Heating degree days
- 43
- Cooling degree days
- 130
Clarksville in July
Highs average 83°29° and lows 60°16°, with 4.3 in109 mm of precipitation in a typical July.
- Record high
- 102°39° (1988)
- Record low
- 38°3° (1988)
- Heating degree days
- 6
- Cooling degree days
- 220
Clarksville in August
Highs average 82°28° and lows 59°15°, with 3.9 in99 mm of precipitation in a typical August.
- Record high
- 100°38° (1948)
- Record low
- 34°1° (1982)
- Heating degree days
- 11
- Cooling degree days
- 184
Clarksville in September
Highs average 77°25° and lows 51°11°, with 3.5 in89 mm of precipitation in a typical September.
- Record high
- 94°34° (1964)
- Record low
- 26°−3° (1963)
- Heating degree days
- 101
- Cooling degree days
- 74
Clarksville in OctoberThis month
Highs average 65°18° and lows 40°4°, with 3.3 in83 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 90°32° (2019)
- Record low
- 16°−9° (1965)
- Heating degree days
- 399
- Cooling degree days
- 9
Clarksville in November
Highs average 53°12° and lows 30°−1°, with 2.9 in75 mm of precipitation and 0.7 in1.8 cm of snow in a typical November.
- Record high
- 84°29° (1948)
- Record low
- 2°−17° (1976)
- Heating degree days
- 699
- Cooling degree days
- 0
Clarksville in December
Highs average 43°6° and lows 25°−4°, with 3.3 in84 mm of precipitation and 6 in14 cm of snow in a typical December.
- Record high
- 77°25° (1982)
- Record low
- −16°−27° (1989)
- Heating degree days
- 969
- Cooling degree days
- 0